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Old 05-21-2017, 11:44 PM   #1
Lawrie
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Default valve ID

I have a set of new valves for a flathead I,m building up.
it came with a set of new Precision engine parts valves part number P1821-7 and P 1821, would anyone know what the difference is,is one for the inlet?
Thanks Lawrie
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Old 05-22-2017, 12:17 AM   #2
WestCoast
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Default Re: valve ID

Lawrie as you probly already know already know, original ford intake valves had a dish in the center of the valve, exhaust had flat top valves
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Old 05-22-2017, 01:19 AM   #3
Brian
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Default Re: valve ID

Try with a magnet; ex valves are non magnetic
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Old 05-22-2017, 01:44 AM   #4
Lawrie
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Default Re: valve ID

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Brian they both are non magnetic.
West coast,8 of them have the dish ,
So I will use the dished ones in the intake.
thanks Brian and west coast.
Lawrie
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